You wouldn't get a 458 for its interior, but it's not like it a crappy kit car fittings either. I've had the opportunity to sit in one and it's proper quality in there, with nice lashings of premium leather and everything was put together pretty solidly. Modern Ferraris are pretty nice places to be in.

Be happy Ferrari has improved its interior. Leather/Alcantara/Stitching has never been a issue on italian cars. It was fit and the quality of plastic. Look at the Maserati GT, perfect interior quality, only a bunch of cheap (looking?) plastic.